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John Klein

b. 2002

American baseball player (born 2002)

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About John Klein

Born 2002. John Klein is a baseball player.

John Joseph Klein (born April 22, 2002) is an American professional baseball pitcher for the Toronto Blue Jays of Major League Baseball (MLB). He made his MLB debut in 2026 for the Minnesota Twins.

Career Minnesota Twins Klein attended Osseo High School in Osseo, Minnesota, and played college baseball at Iowa Central Community College. He did not start pitching full-time until college. In 2021 and 2022, he played collegiate summer baseball for the Willmar Stingers of the Northwoods League. He signed with the Twins as an undrafted free agent in 2022.

Klein made his professional debut in 2022 with the Florida Complex League Twins. He pitched 2023 with FCL Twins, Fort Myers Mighty Mussels and Cedar Rapids Kernels and all of 2024 with Cedar Rapids. He started 2025 with the Double-A Wichita Wind Surge before being promoted to the Triple-A St. Paul Saints.

On November 18, 2025, the Twins added Klein to their 40-man roster to protect him from the Rule 5 draft. Klein was optioned to Triple-A St. Paul to begin the 2026 season. On May 2, 2026, Klein was promoted to the major leagues for the first time.

Toronto Blue Jays On August 3, 2026, Klein, Dasan Hill, and Dameury Pena were traded to the Toronto Blue Jays in exchange for Jeff Hoffman.

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Important facts

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People in John Klein's life

Named in this biography and alive at the same time

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Frequently asked questions

Who is John Klein?

American baseball player (born 2002)

When was John Klein born?

John Klein was born on 22 April 2002.

What is John Klein's occupation?

John Klein is a baseball player.

Sources & further reading

· Wikipedia: John Klein

· Wikidata: Q139750458

· DBpedia: John Klein (baseball)

Cite this page

APA: Biography.guide. (2026). John Klein. https://biography.guide/john-klein-baseball-player/

MLA: "John Klein." Biography.guide, https://biography.guide/john-klein-baseball-player/.

Chicago: "John Klein." Biography.guide. https://biography.guide/john-klein-baseball-player/.

Data last updated: 2026-09-20 · Spot an error? Report a correction.

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